AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2025-02-20 16:26:06 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

Documentation: Fix up docs still talking about i_sem

Browse Source 
.. it got changed to 'i_mutex' some time ago.

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Josef 'Jeff' Sipek 2007-05-24 12:21:43 -04:00 committed by Linus Torvalds
parent 8f53b6fcc4
commit c2b38989cf
2 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/filesystems/directory-locking
View File

@ -1,5 +1,6 @@
Locking scheme used for directory operations is based on two Locking scheme used for directory operations is based on two
kinds of locks - per-inode (->i_sem) and per-filesystem (->s_vfs_rename_sem). kinds of locks - per-inode (->i_mutex) and per-filesystem
(->s_vfs_rename_mutex).
For our purposes all operations fall in 5 classes: For our purposes all operations fall in 5 classes:
@ -63,7 +64,7 @@ objects - A < B iff A is an ancestor of B.
attempt to acquire some lock and already holds at least one lock. Let's attempt to acquire some lock and already holds at least one lock. Let's
consider the set of contended locks. First of all, filesystem lock is consider the set of contended locks. First of all, filesystem lock is
not contended, since any process blocked on it is not holding any locks. not contended, since any process blocked on it is not holding any locks.
Thus all processes are blocked on ->i_sem. Thus all processes are blocked on ->i_mutex.
Non-directory objects are not contended due to (3). Thus link Non-directory objects are not contended due to (3). Thus link
creation can't be a part of deadlock - it can't be blocked on source creation can't be a part of deadlock - it can't be blocked on source

8
Documentation/filesystems/porting
View File

@ -107,7 +107,7 @@ free to drop it...
--- ---
[informational] [informational]
->link() callers hold ->i_sem on the object we are linking to. Some of your ->link() callers hold ->i_mutex on the object we are linking to. Some of your
problems might be over... problems might be over...
--- ---
@ -130,9 +130,9 @@ went in - and hadn't been documented ;-/). Just remove it from fs_flags
--- ---
[mandatory] [mandatory]
->setattr() is called without BKL now. Caller _always_ holds ->i_sem, so ->setattr() is called without BKL now. Caller _always_ holds ->i_mutex, so
watch for ->i_sem-grabbing code that might be used by your ->setattr(). watch for ->i_mutex-grabbing code that might be used by your ->setattr().
Callers of notify_change() need ->i_sem now. Callers of notify_change() need ->i_mutex now.
--- ---
[recommended] [recommended]